Production of fast shades on vegetable fibers and dyestuffs therefor



UNITED STATES PATENT OFFICE.

EERBERT LEVINSTEIN AND JAMES BADDILEY, 0F MANCHESTER, ENGLAND.

PRODUCTION OF FAST SHADES ON VEGETABLE FIBERS AND DYESTUFFS- THEREFOR.

1 36b ,"FOG.

It't'e Drawing.

5' '0 all whom it may concern:

tie it known that We, Hnnnnn'r LEVIN- s'rnm and J AMES BADDILEY, both subjects ot the King of Great Britain and Ireland, and both residents of Blackley, Manchester, in the county of Lancaster, England, have invented new and useful Improvements in the Production of Fist Shades on Vegetable Fibers and Dyestuffs Therefor, of which the 'i'iollowing is a specification This invention relates to the production oi :tast blue shades on vegetable fibers and dyestuffs therefor, and is a continuation in part 0% our earlier co-pending application filed 1st December 1914; under Serial No. 8043117 It has been shown in the specification of our prior British Letters Patent No. 2'i'52-5 of 19152 that by coupling two molecules of resorcin with atetrazo body comprising the following nucleus Where l) is a residue of the general consti- 'tution .Ar.CO..NH.Ar.

It dyes cotton directly in reddishorange shades which on aftertreatment wlth format dehyde becomes fast t boiling soap.

Specification of Letters Patent.

Application filed February 14:. 1916. Serial No.

Patented Jan. 18, 1921.

two molecules of resoicin with tetrazo conipounds comprising the following nucleus:

on D being a residue of the following constitu tion Ar CHzCH- Ar- 228 parts 01": nieta-azoxyanilin are tetrazotized in the usual Way by means of 138 parts of sodium nitrite and the tetrazo-compound poured into a solution of: 358 parts of metaaminobenzoyl-Q.amino.5.naphthol.7. sultonic acid dissolved in a sufficient excess of so dium carbonate to keep the reaction mixture alkaline. is formed it is rediazotized by acidifying the mixture and adding 69 parts of sodium nitrite. and the tetrazo-conipound thus pro duced is poured into a solution of 220 parts of resorcin containing sufiicient sodium carbonate to keep the reaction mixture allialine. When the combination is completed the dyestul'l' is isolatcd'in the usual way. in i the form of" its sodium salt it forms a dark powder, dissolving in Water to an orange colored solution. When reacted upon by redu'cing agents it splits up aniliiu meta-aminobenzoyl 2.arnino.8.arni no.531aphthol'T-sultonic acid and aminoresorcin. It probably has the constitution none A un n.oo.oinu-izit-061M011),

llsing diaminodiphenylether in place of the meta-unoxyanilin used above, a red dyestufi is obtained showlng slmllar properties,

into nieta-azozty- When the intermediate product lVhat We claim is l. A process for producing substantive dyestuifs capable of being fixed on Vegetable fibers by aft/ertreatinent with formaldehyde 5 Which process consists in coupling two molecules of resorcin with tetrazo compounds comprising the following nucleus D being the nucleus of ;a diamin contain- 15 ing at least two aiylnuclei, one of which is joined to each azo'group attached to said nucleus.

2. A substantive dyestufi capable of being fixed on veegetable fibers by altei'tlcetinent with forinaildehyde produced by couphng two molecules of resorcin with tetirazo compounds coinprlslng the following nucleus on D being the nucleus of a diumin containour hands.

HERBERT LEVINHllElN. JAMES BADDILEY. 

